Apparatus for washing sand and like material.



S. A. GAPRON.

APPARATUS FOR WASHING SAND AND LIKE MATERIAL.

APPLICATION FILED MAY 19,1909.

Patented Dec. 13, 1910.

l HVIIIIIIIIIIHIIIHU SETH A. CAPRON OF WESTFIELD, MASSACHUSETTS.

APPARATUS FOR WASHING' SAND AND LIKE MATERIAL.

Specification of Letters Patent.

Patented Dec. 13, 1910.

Application filed May 19, 1909. Serial No. 496,908.

To all whom it mayconcem:

Be it known that I, SETH A. CAPRoN, a cltlzen of the United States, andresident of Westfield, in the county 'of Hampdenand State ofMassachusetts, have invented new and useful Improvements in Apparatusfor Washing Sand and Like Material, of'which the following is aspecification.

My invention relates to apparatus for cleansing and classifyingsolid'mate'rial and v is especially addressed to the cleansing of 1being core sand after use in a foundry.

After once being used in the manufacture of castings, core sand shouldbe cleansed and freed from impurities, bits of stone, scra metal, andthe like before it is again use for core purposes. 'The practiceheretofore prevailing 18 to cleanse oore sand by means of an air blast,and 'one object of m invention is to substitute a wet rocess which willbe at least as effective an at'the'same time chea er than the airprocess.

In-t-he drawings hereto annexed,-Figure 1 is a vertical longitudinalelevation, partly in section, of an apparatus embodying my invention;and Fig. 2 is an end view in section at line 2-2 0 Fig. 1.

L represents a cylindrical drum of sheet.

iron or other suitable material secured to the shaft Mby means of siders N and rovided with end flanges at L and L the ange L deeper thanthe flange L Circular openings at B and C are thus formed concentricwith the shaft M.' The shaft M with the drum L is mounted on bearings sothat the drum is substantially horizontal and a pulley P or equivalentmeans for rotating the drum L' is secured to the shaft M. The

[material to be cleansed, for instance, a mass of core sand containingdirt, stones, b1ts of scrap metal, or other foreign matter is introducedinto thedrum through the inclined hopper A which is secured .to anysuitable framework outside of 'the drum L and projects inward throu hthe openin B at one side of-the shaft Through t e openin B there is alsointroduced a water pipe which is preferablyprovided with aspray nozzle Xwherewith to spray and scatter water upon the entering material.

On the interior of the drum L, I rovide a series of agitating flanges.The anges F are arranged angularly or spirally so that as the drum L isrotated in the direction of the arrow in Fig. 2, the flanges F not onlyscoop u the solid material from the bottom of the rum, but also propelit toward the delivery opening C. The pro elling angle of the flanges Imay be varie within reasonable limits and may be very sli ht as theconstant agitation of the materia together with the flow of water fromthe feed end to the discharge end of the drum will carry the materialtoward the discharge end even though the propelling angle of theflangesF be not very steep. For ordinary practlce I recommend a drum about 30"in diameter with flanges, as F, projectin four inches from the shell 0the drum and setat an angle of about 30 to the axis of the drum.Preferably, also, I provide several sets of agitating flanges and makeone set staggered with another as indicated in Fig. 1.

- t or near the discharge end of the drum, I arrange agitating flangesprojecting from the interior of the drum as at G. These flanges are setat a retarding angle so that their tendency is to move the solidmaterial back from the discharge end of the drum. The flanges G thusprevent the heavy materials from piling up near the discharge end of thedrum in such manner as to fall out with the li hter materials and waterthrough the disc arge cone at K which surrounds the lip of the o eningC. The angle at which the flan es are set is such that the heavy materias on being carried up by the flan es are spilled into the dischargechute which is secured to an external framework and projects outwardthrough the openin C deliverin the material upon an incline screen S.ater and light material suspended therein flows out through the openingC and over the dischar e cone K into a trough D through which it ows toa settling tank T.

The operation of the washing machine is as follows: Waterbeing-introduced-through the pipe W and core sand with admixedimpurities being introduced through the hopper A, the solid and liquidcontents of the drum are thoroughly agitated by the agitating flanges F,the sand and other heavy materials being carried up and spilled againinto the water and at the same time being moved by the successive actionof these inward about flanges toward the outlet end of the drum.

water over the lip of the cone K to the trough D and flow to thesettling tank, whereas sand and other heavy materials while agitated areprevented from forming a mass of mud at the discharge end of the drum bythe operation of the flanges Gr which, as above described, are set at are tarding angle so that they tend to move the heavy material away fromthe discharge opening C. These heavy materials having thus been washedand freed from dustand light dirt of all kinds, are carried up by theflanges G and spilled upon the discharge chute H which conducts them tothe inclined screen S. This screen is of proper mesh to allow the washedsand to pass through it but to retain and deliver at the end of thescreen all larger particles such as stones and scraps of metal. Suitablereceptacles, not shown,:may be placed beneath and at the end of thescreen S to catch the separated materials. j

An apparatus constructed as above described has a large operativecapacity and will clean and separate core sand and the like moreeconomically than any of the methods known to me which have been invogue. I

What I claim and desire to secure by Letters Patent is:

1. In a machine for washin sand and like materials, the combination witha rotatable drum having its ends closed save for central feedandtdischarge openings; of flanges provided interiorly of said drum, theflanges adjacent the feed opening being inclined forwardly in thedirection of rotation of said drum, and the flanges adjacent thedischarge opening being inclined oppositely to said first-namedfianges,so as to prevent the material being washed from piling u near thecorresponding end of the drum an means for constantly conveying materialfrom the drum as it is raised by the flanges adjacent the dischargeopening.

2. In a machine for Washing sand and like materials, the combinationwith a rotatable drum having its ends closed save for central feed anddischarge openings; of flanges provided on the interior wall of saiddrum, the

flanges adjacent the feed opening being in clinedforwardly in thedirection of rotation of said drum, andthe flanges adjacent thedischarge opening being inclined oppositely to the first-named flanges,so as to prevent the material being washed from piling up near thecorresponding end of the drum and means for constantly conveyingmaterial from the drum as it is raised by the flanges adjacent thedischarge opening.

3. In a machine for washing sand and like Y materials, the combinationwith a drum rotatable on a horizontal axis, said drum having its endsclosed save for central feedand discharge openings; of means forsupplying material delivered thereto by the internal flanges adjacentthe discharge opening and to constantly discharge said material.

Signed by me at Westfield, Massachusetts, this 15 day of May 1909.

SETH A. CAPRON. Witnesses:

Lnwls C. PARKER, FLORENCE I. SMITH.

